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Near-ultraviolet excitable pseudo-wollastonite α-CaSiO3: Eu2+ blue phosphor for white light-emitting diodes

MINGXING MA1,2, DACHUAN ZHU2, ZHIXIN WANG1,* , TAO HAN3

Affiliation

  1. School of Materials and Chemical Engineering, Zhongyuan University of Technology, Zhengzhou 450007, China
  2. College of Material Science and Engineering, Sichuan University, Chengdu 610065, China
  3. College of Chemistry and Environmental Technology, Chongqing University of Arts and Sciences, Chongqing 402160, China

Abstract

Pseudo-wollastonite α-CaSiO3 doped with Eu2+ was obtained through one-step calcination of precursors prepared by chemical co-precipitation method. This phosphor emits a strong blue band peaking at 449 nm with full width at half maximum of about 35 nm under the excitation at 365 nm. The blue luminescence originates from the allowed f-d transition of Eu2+ ions on Ca2+ sites. The energy transfer of Eu2+ in pseudo-wollastonite α-CaSiO3:Eu2+ phosphor has been demonstrated to be a resonant type via a dipole-dipole mechanism. α-CaSiO3:Eu2+ phosphor shows higher thermally stable luminescence which was found to be better than commercially available Y3Al5O12:Ce3+ phosphor.

Keywords

Optical materials, Photoluminescence spectroscopy, Luminescence, Optical properties.

Citation

MINGXING MA, DACHUAN ZHU, ZHIXIN WANG, TAO HAN, Near-ultraviolet excitable pseudo-wollastonite α-CaSiO3: Eu2+ blue phosphor for white light-emitting diodes, Optoelectronics and Advanced Materials - Rapid Communications, 17, 3-4, March-April 2023, pp.148-151 (2023).

Submitted at: Jan. 15, 2023

Accepted at: April 7, 2023